Fine French brandy (6)
(Other definitions for cognac that I've seen before include "High quality brandy" , "Good brandy" , "strong drink" , "Type of brandy" , "Brandy as for Napoleon (6)." .)
(Other definitions for armagnac that I've seen before include "stronger drink than ale" , "Type of brandy" , "Brandy traditionally made in Aquitaine" , "Liquor" , "A gram can for a French brandy" .)